Method of making boat hulls



sept. 25, ,1951 R, M BROWN 2,569,224`

' METHOD oF MAKING BOAT HULLs -Filed Nov. 14, 1949 Fig;

2 Ralph Myron Brown nventor N2 'y www attorney Patented sept. 25, 1951 2,569,224

UNITED sTATEsPATENT OFFICE 2,569,224 METHOD OF MAKING BOAT HULLs Ralph M. Brown, Penn Yan, N. Y., assigner to Penn Yan Boats, Inc., Penn Yan, N. Y., a corporation of New York Application November 14, 1949, Serial No. 127,225

2 claims. (o1. 9 6) This invention relates to laminated hull structures for boats and to a method of making such a structure. One object of the invention is `to provide a method of laminating a hull in Which the proper positioning of the fastening members 5 at a time is added, it is a simple matter to drive through the several laminations is assured.' Anthe nails so they Will strike the ribs. other object of my invention is to provide a simple In accordance with known practice, canvas and effective method of building up laminations. would then be stretched over the inner 'layer LI of In small boat construction, it has been custhe Flanking with marine glue, Cement, 01 the tomary tc bund laminated hulls using a canvas like, but I omit this step. substituting a translayer between two planked layers, rendering the parent plastic hlm, 01 Sheet, fOI' the Canvas and canvas layer Waterproof with suitable paint, entirely omitting the glue, or adhesives. marine glue, or the like. However, canvas lacks After the plenking layer Ll is in place, I prefer the permanency desired and is subject to oxidizto sand or smooth the planks and then mark the ing and, even with the most improved treatment, planks With a line I6 designating the Centers 0f tends to deteriorate, or rot, after prolonged usage the ribs I2; or, if preferred, with lines ll reprea-s it ultimately absorbs water, and lying between senting the edges 0f the ribs. This may he dOIle planking loses its strength. Moreover, canvas is With Chalk, pencil, or the like. not ideal for other reasons. One being that after The neXt Step is t0 stretch a layer 0f transiaying the mst layer cf planks on ribs and coverparent 0r translucent lm 20 over the planking ing with canvas, it is diicult to lay on the second layer Ll. This is preferably a single sheet, but layer, or outer layer of planks, because it is diffimere then 011e Sheet may be usedy if desired. cult to determine just where fasteners will pass A polyethylene lm is useful, although ant7 transthrcugh to the ribs which are, of course, conparent 0r translucent film which is Waterproof, cealed by the canvas and the first plank layer. stretchable, and I10t brittle, may he elnlJlOyed. My invention is particularly directed to over- Other materials may he Vinyldene Chloride and coming these diiculties. polyvinyl chloride acetate sheeting. The mark- Coming now to the drawing wherein like referings I6 or I1 can be seen through this transparent ence characters denote like parts throughout: 01 translucent layer When the Gute-1' layer 0I Fig. 1 is a side elevation of a sma11 boat 11u11, 30 planks L2 is applied. As each plank is placed shown somewhat schematically with parts in difon the film, the exact location of the fasteners ferent stages of construction, and illustrating a can be determined, s0 that all the fasteners I4 preferred embodiment of my invention; Will strike the ribs l2. If clinchng points are Fig. 2 is an enlarged fragmentary viewp also used, they will pass through Outer plank layer showing a part of a laminated hull structure. L2 and thenee through sheeting 20, thlOugh the` The relation of separate layers is shown; and inner plenking LI and through the ribs I2. The Fig, 3 is a, half section through the boat 111111 Steel bottoms I3 Will turn the pOints back into the shown in Fig. 1 and showing the laminated hull ribs. Other types of fasteners, such as rivets. in section. The dimensions of the section are 0I` the like, may be used, if desiredexaggerated. Not only does the translucent or transparent My invention comprises broadly a method of layer 2n permit the operator to rapidly plank the making the laminated hull in which a much more hull, but it forms a superior hull. It is Waterpermanent hull can be produced with much proof. No cement is required. All the fasteners greater ease, and in which the proper positioning reach the ribs. It is not affected by the nishV of the inside and outside fasteners can be asplaced on the plank layers, as varnishes and sured. Moreover, the assembly of the hull is lacquers do not oxidize the film. The planks may not only improved, but the speed and accuracy be treated with rot inhibitors, such as Cupernol. of the assembly materially increased. It needs no waterproofing compound and it does A preferred embodiment will now be described. not absorb water. It is solely held in place by In making small boat hulls, such as canoes, 5o the layers of planking LI and L2 and the fasdinghies,` and larger sail boats of light-weight teners. It does not hold moisture so there is no construction, it is convenient tohave a mold destendency for the planking layers LI and L2 to ignated as I0 in Fig. l, with grooves II of a size rot. to receive U-shaped ribs I2 which are pre-bent If more than one lsheet of film is used, the edges and snapped into the grooves. These grooves inof the sheets may be permanently joined by 2 clude bottoms I3 preferably of steel sufficiently hard to turn the points of chisel-shaped nails I4. These nails may be driven through planks I5 to fasten the planks to the ribs I2 and as one plank known methods of cementing, welding, or the like. Special cements are known for the dinerent types of sheeting.

I have described a preferred hull and method of making the same, and one which gives a complete and satisfactory method of obtaining the objects of my invention. Obviously, changes will suggest themselves to those skilled in the art. I contemplate, as within the scope of my invention, all such forms as may come within the scope of the appended claims.

I claim:

1. The method of making a laminated boat hull which comprises planking ribs with an inner layer of planking, fastening the planking to the ribs, marking on the outside of the planking the location of the ribs, applying a plastic film layer over the marked planking, said layer being sufficiently transparent to view the marking therethrough, applying one plank at a time of an outer layer of planking, fastening the outer layer of planks by fasteners passed through the outer planks, through the film and inner layer of marked planks, locating the fasteners by the marks on the inner planks visible through the plastic film, whereby the fasteners of the outer planks are guided into the ribs.

2. The method of making a laminated boat hull which comprises supporting ribs in position for a hull, applying an inner layer of planking on the ribs, marking the planking on the outside to indicate the position of the ribs, stretching without fastening a layer of waterproof, plastic, transparent lm over the marked planks applied to the ribs, applying an outer layer of planks to the waterproof, plastic, transparent film and fastening the transparent lm and outer planks by fasteners located in accordance with the markings on the inner planking layer showing through the transparent layer and driven through the inner planking layer and into the ribs.

RALPH M. BROWN.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS 

